Yeah, I remember having lab work on some wednesdays during my undergrad, too. Absolutely ridiculous - everyone knows that wednesdays is sports day, and sport is as valid a part of any curriculum, and is healthy to do. Whenever both were scheduled on the same day, though, those who had sporting responsibilities were allowed to switch with people doing the lab work on another day, so it was alright.
I really want to get back into sport, too. Football or badminton. I'd really like to know if that would cause a problem (thumbs up on the topic Matthew ^_^)